Remove handling for python3.5 datetime implementation

Author: ijl

src/datetime.rs

@@ -41,7 +41,6 @@ macro_rules! write_microsecond {
 }
 
 pub enum DatetimeError {
-    Offset,
     Library,
 }
 
@@ -69,13 +68,9 @@ pub fn write_datetime(
                         std::ptr::null_mut() as *mut pyo3::ffi::PyObject,
                     )
                 };
-                // test_datetime_partial_second_pendulum_not_supported
-                if offset.is_null() {
-                    return Err(DatetimeError::Offset);
-                }
                 offset_second = ffi!(PyDateTime_DELTA_GET_SECONDS(offset)) as i32;
                 offset_day = ffi!(PyDateTime_DELTA_GET_DAYS(offset));
-            } else if unsafe { pyo3::ffi::PyObject_HasAttr(tzinfo, NORMALIZE_METHOD_STR) == 1 } {
+            } else if ffi!(PyObject_HasAttr(tzinfo, NORMALIZE_METHOD_STR)) == 1 {
                 // pytz
                 let offset = unsafe {
                     pyo3::ffi::PyObject_CallMethodObjArgs(

src/encode.rs

@@ -171,9 +171,6 @@ impl<'p> Serialize for SerializePyObject {
             let mut dt: SmallVec<[u8; 32]> = SmallVec::with_capacity(32);
             match write_datetime(self.ptr, self.opts, &mut dt) {
                     Ok(_) => serializer.serialize_str(str_from_slice!(dt.as_ptr(), dt.len())),
-                    Err(DatetimeError::Offset) => {
-                    err!("datetime does not support timezones with offsets that are not even minutes")
-                    }
                     Err(DatetimeError::Library) => {
                     err!("datetime's timezone library is not supported: use datetime.timezone.utc, pendulum, pytz, or dateutil")
                     }